[apiegare]

Apparently the vacuum for the power brakes is generated by the oil pump, does anyone know how this works? Where does the air go? Also that chunk of foam rubber on top of the motor near the oil fill seems weird, isn't it highly flammable, thinking of discarding it.

 

[k.aoi]

Apparently the vacuum for the power brakes is generated by the oil pump, does anyone know how this works? Where does the air go? Also that chunk of foam rubber on top of the motor near the oil fill seems weird, isn't it highly flammable, thinking of discarding it.

Unless something is fundamentally different than the other EA211 engines there is an electric vacuum pump. Turbo engines will typically have an electric vacuum pump, or a cam driven one. Any foam they put on the engine will be heat/flame resistant. Other DI cars I've had have a foam cover on the HPFP to reduce noise, that doesn't seem to be the case here but it's nothing to worry about.

 

[apiegare]

Only the 1.4L version has the electric vacuum pump. otherwise:

 

[k.aoi]

Interesting, never heard of that before. I'm guessing it's the Bosch system, but there's minimal information on how it actually works other than a few sentences. A proper diagram or teardown would be nice. I'm guessing the air goes through the PCV system like other crankcase pressure would.

Combined vacuum and engine oil pump

Bosch combined pump can perform two tasks with a single component.

www.bosch-mobility-solutions.com

 

[fredwolff]

Only the 1.4L version has the electric vacuum pump. otherwise:
View attachment 782

1.4l S. American version